getting rid of weak apf::getEntityDimension

This function just looked up in apf::Mesh::typeDimension.
What people really want is getDimension(mesh,entity).

I also brought parma_meshaux.h to parma_dcpart.cc, which
removed some duplicate functions
split lines of 80 chars in some of parma
replace parma's getEntDim with apf::getDimension
generalizing getBridgeAdjacent to go up or down

there are two implementations to try and
preserve the performance gains of static
arrays.
simplifying parma_meshaux.h

new convenience functions in apfMesh.h can be reused
to make this code shorter, also fixed whitespace